CN113573225A - Audio testing method and device for multi-microphone phone - Google Patents
Audio testing method and device for multi-microphone phone Download PDFInfo
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- CN113573225A CN113573225A CN202110717233.3A CN202110717233A CN113573225A CN 113573225 A CN113573225 A CN 113573225A CN 202110717233 A CN202110717233 A CN 202110717233A CN 113573225 A CN113573225 A CN 113573225A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/24—Arrangements for testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/004—Monitoring arrangements; Testing arrangements for microphones
Abstract
The invention relates to the technical field of microphone audio test, and discloses an audio test method and device for a multi-microphone phone, wherein the method comprises the following steps: a plurality of microphones of the phone pick up sound simultaneously and generate a multi-channel audio file; converting the multi-channel audio file into a plurality of first frequency response curves; comparing each first frequency response curve with the test frequency response curve respectively to obtain a plurality of first difference curves, and judging whether the plurality of first difference curves are in a preset curve interval; if so, determining that the telephone passes the audio test; otherwise, determining that the phone fails the audio test. Has the advantages that: the microphones of the phone pick up the same test audio at the same time, so that time waste caused by playing the same test audio for multiple times is avoided, and meanwhile, interference caused by audio difference of the first audio file played for multiple times is avoided; the generated single-channel files are synthesized into multi-channel files and analyzed by the electroacoustic test system in multiple processes, so that the analysis time can be saved, and the test efficiency can be improved.
Description
Technical Field
The invention relates to the technical field of microphone audio testing, in particular to an audio testing method and device of a multi-microphone phone.
Background
After the telephone is produced and before the telephone leaves a factory, Spk (loudspeaker) and Mic (microphone) in the telephone need to be tested so as to verify whether the performances of Spk and Mic meet the indexes. In the prior art, the Fr and THD + N tests of the phones Spk and Mic are performed by using a TS system: the TS system is a Trustsystem electro-acoustic testing system, and is audio test analysis software developed by Beijing Ruisen New Spectrum science and technology Co.
Testing the phone using the TS system, the testing comprising: spk test, Mic test, and ERL test.
Spk test: the PC tool controls the computer TS to output sweep frequency signals, the sweep frequency signals are broadcasted from spk of the phone through the sound card (the output gain is fixed inside the phone, meanwhile, audio signals are processed by bypass, a line to spk channel is established), the TS controls the artificial ear to pick up sound, the sound card is amplified, and the sound card returns to TS analysis Fr and THD + N of the computer.
Mic test: the PC tool controls the TS software of the computer to output sweep frequency signals, the sweep frequency signals are broadcasted from an artificial mouth through a sound card of the TS, mic pickup of the TS control phone (the inside of the phone is fixedly output with gain, and meanwhile, audio signals are processed with bypass to establish a mic-to-lineout single channel) is returned to the TS analysis Fr and THD + N of the computer through the sound card.
ERL test: the PC tool controls the computer TS software to output sweep frequency signals, the sweep frequency signals are broadcasted from spk of the phone through the sound card (the internal of the phone is fixedly output with gain, and meanwhile, audio signals are processed with bypass to establish a linein-to-spk channel), and the TS tool controls mic pickup of the phone (the internal of the phone is fixedly output with gain, and simultaneously, audio signals are processed with bypass to establish a mic-to-lineout channel) and returns TS analysis Fr and THD + N of the computer through the sound card.
When performing the Mic test and the ERL test, the TS system can only test each Mic one by one. However, the prior art telephone set often has a plurality of Mics, so that Mic and ERL tests are repeated for several times, and the total test time depends on the total channel number of the telephone set Mic. Example (c): when 8 Mics are built in the UVC40, 8 Mic tests and 8 ERL tests are needed, namely the TS tests are run for 16 times, so that the test time of each phone is greatly prolonged, and the test efficiency of the phones is reduced.
Meanwhile, due to the limitations of test environments and equipment, the consistency of Mic/ERL test results of multiple Mic phones and each Mic/ERL test station can fluctuate, and a certain proportion of retest conditions exist. The reason is that the sound insulation effect of the production silencing room is limited, the production silencing room cannot be compared with a professional silencing room, the production environment noise is random and is larger (more than 110dB), the Mic/ERL16 tests are completed on the same platform, and if 1 interference occurs and the test is abnormal, repeated testing and re-judgment are needed.
In addition, because the Spk/artificial mouth playing frequency response curve floats, the test results float after being tested for many times.
Therefore, it is necessary to improve the existing testing method and apparatus for multi-microphone phone, so as to improve the testing efficiency of multi-microphone phone and reduce the interference of environment and equipment in the process of repeated testing.
Disclosure of Invention
The purpose of the invention is: the method and the device for testing the multi-microphone are improved, so that the testing efficiency of the multi-microphone is improved, and the interference of environment and equipment in the repeated testing process is reduced.
In order to achieve the above object, the present invention provides an audio testing method for a multi-microphone phone, comprising:
and playing the first test audio to the phone so that a plurality of microphones built in the phone can pick up sound at the same time to generate a multi-channel audio file.
And receiving a multi-channel audio file sent by the telephone, and converting the multi-channel audio file into a plurality of first frequency response curves.
And comparing each first frequency response curve with a test frequency response curve to obtain a plurality of first difference curves, wherein the test frequency response curve is a frequency response curve corresponding to a frequency sweep signal for generating the first test audio.
Judging whether the plurality of first difference curves are within a preset curve interval or not; if all the first difference curves are within the preset curve interval, determining that the phone passes an audio test; otherwise, determining that the phone fails the audio test.
Further, the playing the first test audio to the phone specifically includes:
and sending a preset frequency sweeping signal to a sound card and a power amplifier for processing, and playing through an artificial mouth to generate a first test audio.
Further, the playing the first test audio to the phone specifically includes:
and sending a preset frequency sweeping signal to a sound card for processing, and then playing through a loudspeaker of the phone to generate a first test audio.
Further, the method for generating a multi-channel audio file by simultaneously picking up sound by a plurality of microphones built in the phone specifically includes:
a plurality of microphones built in the phone pick up sound simultaneously and generate single-channel audio files corresponding to each microphone, and the plurality of single-channel audio files are synthesized into a multi-channel audio file.
Further, the receiving the multichannel audio file sent by the phone specifically includes:
receiving a multi-channel audio file sent by the telephone through a USB protocol;
or, receiving the multichannel audio file transmitted by the telephone by using a third-party file server tftp32 tool through multiple TCP/IP protocols.
The invention also discloses an audio test method of the multi-microphone phone, which comprises the following steps:
and receiving the played first test audio and enabling a plurality of built-in microphones to pick up sound simultaneously to generate a multi-channel audio file.
Sending a multi-channel audio file to an electroacoustic test system, enabling the electroacoustic test system to convert the multi-channel audio file into a plurality of first frequency response curves, enabling the electroacoustic test system to compare the plurality of first frequency response curves with the test frequency response curves to obtain a plurality of first difference curves, and judging whether the plurality of first difference curves are within a preset curve interval; if all the first difference curves are within the preset curve interval, determining that the phone passes an audio test; otherwise, determining that the phone does not pass the audio test; and the test frequency response curve is a frequency response curve corresponding to a frequency sweeping signal for generating the first test audio.
The invention also discloses an audio testing device of the multi-microphone phone, which comprises: the device comprises a first control module, a first receiving module, a first comparison module and a first judgment module.
The first control module plays a first test audio to a phone so that a plurality of microphones built in the phone can pick up sound at the same time to generate a multi-channel audio file.
The first receiving module receives the multi-channel audio files sent by the phone and converts the multi-channel audio files into a plurality of first frequency response curves.
The first comparison module compares each first frequency response curve with a test frequency response curve to obtain a plurality of first difference curves, wherein the test frequency response curve is a frequency response curve corresponding to a frequency sweep signal for generating the first test audio.
The first judging module is used for judging whether the plurality of first difference curves are within a preset curve interval or not; if all the first difference curves are within the preset curve interval, determining that the phone passes an audio test; otherwise, determining that the phone fails the audio test.
Further, in the audio testing apparatus, the playing of the first test audio to the phone specifically includes:
and sending a preset frequency sweeping signal to a sound card and a power amplifier for processing, and playing through an artificial mouth to generate a first test audio.
Further, in the audio testing apparatus, the playing of the first test audio to the phone specifically includes:
and sending a preset frequency sweeping signal to a sound card for processing, and then playing through a loudspeaker of the phone to generate a first test audio.
Further, in the audio testing apparatus, the enabling of multiple microphones built in the phone to pick up sound at the same time to generate a multi-channel audio file specifically includes:
a plurality of microphones built in the phone pick up sound simultaneously and generate single-channel audio files corresponding to each microphone, and the plurality of single-channel audio files are synthesized into a multi-channel audio file.
Compared with the prior art, the audio test method and the device of the multi-microphone phone disclosed by the invention have the beneficial effects that: the microphones of the phone can simultaneously pick up the same test audio, so that the time consumption of repeatedly playing and picking up the audio when each microphone is independently tested is avoided, and each microphone receives the same first audio file, so that the interference caused by the audio difference of the first audio file played for multiple times can be avoided; the generated single-channel files are synthesized into multi-channel files and analyzed by the electroacoustic test system in multiple processes, so that the analysis time can be saved, and the test efficiency can be improved.
Drawings
Fig. 1 is a schematic flow chart illustrating an audio testing method for a multi-microphone phone according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an audio testing apparatus of a multi-microphone phone according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example 1:
as shown in fig. 1, an audio testing method for a multi-microphone phone according to a preferred embodiment of the present invention is applied to an electroacoustic testing system, and the method includes the following steps:
step S1, playing a first test audio to a phone to enable multiple microphones built in the phone to pick up sound simultaneously, so as to generate a multi-channel audio file.
And step S2, receiving a multi-channel audio file sent by the phone, and converting the multi-channel audio file into a plurality of first frequency response curves.
Step S3, comparing each first frequency response curve with a test frequency response curve to obtain a plurality of first difference curves, where the test frequency response curve is a frequency response curve corresponding to a frequency sweep signal for generating the first test audio.
Step S4, judging whether the first difference curves are in a preset curve interval; if all the first difference curves are within the preset curve interval, determining that the phone passes an audio test; otherwise, determining that the phone fails the audio test.
In step S1, the playing the first test audio to the phone specifically includes:
and sending a preset frequency sweeping signal to a sound card and a power amplifier for processing, and playing through an artificial mouth to generate a first test audio.
In embodiment 1 of the present invention, a phone with eight microphones is used as an example, when a mic test is performed, an electroacoustic test system outputs a sweep frequency signal, the sweep frequency signal passes through a sound card of TS and is sent to a power amplifier, the sweep frequency signal is broadcasted from an artificial mouth, all microphones of the phone are controlled to pick up sound, fixed output gain inside the phone is obtained, meanwhile, an audio signal is processed by bpasss, 8 monaural files are generated after all microphones pick up sound, the 8 monaural files are synthesized into 1 audio file with 8 channels, and the audio file is transmitted to a fixed directory of a computer through a USB or a network, and the electroacoustic test system takes the audio file with 8 channels from the specific directory to perform Fr and THD + N analysis.
In step S1, the playing the first test audio to the phone specifically includes:
and sending a preset frequency sweeping signal to a sound card for processing, and then playing through a loudspeaker of the phone to generate a first test audio.
In embodiment 1 of the present invention, a phone with eight microphones is used as an example, when a mic test is performed, an electroacoustic test system outputs a sweep frequency signal, the sweep frequency signal is broadcasted from a loudspeaker of the phone through a sound card, gain is fixedly output inside the phone, meanwhile, an audio signal processes bypass, a line in to spk path is established, the electroacoustic test system controls all mic pickup of the phone to establish all mic pickup, and then 8 monophonic files are generated, and the 8 monophonic files are synthesized into 1 audio file with 8 channels, and the audio file is transmitted to a fixed directory of a computer through a USB or a network, and the electroacoustic test system takes the audio file with 8 channels from the specific directory to perform Fr and THD + N analysis.
In step S1, the causing of multiple microphones built in the phone to simultaneously pick up sound to generate a multi-channel audio file specifically includes:
a plurality of microphones built in the phone pick up sound simultaneously and generate single-channel audio files corresponding to each microphone, and the plurality of single-channel audio files are synthesized into a multi-channel audio file.
In the embodiment of the present invention, the duration of the audio file may be a long audio file of ten seconds or a short audio file of less than ten seconds, and the generated audio file is stored in the buffer area.
In step S2, the receiving the multi-channel audio file sent by the phone specifically includes:
and receiving the multichannel audio file sent by the telephone through a USB protocol.
Or, receiving the multichannel audio file transmitted by the telephone by using a third-party file server tftp32 tool through multiple TCP/IP protocols.
Because the telephone has a plurality of models, different transmission modes are required to transmit the multi-channel audio file. Aiming at USB series models, such as UVC40, 8-channel audio files in a buffer area inside a phone can be directly copied to a computer storage path set by a PC tool through a USB protocol, and files in 4M are transmitted, so that the audio files can be completed within 1 s. For internet buckle models, such as A30, multiple TCP/IP protocols are adopted, a third-party file server tftp32 tool is needed to realize transmission to a computer to establish a path, and the transmission speed is high.
In the embodiment of the present invention, the electroacoustic test system may be the TS electroacoustic test system mentioned in the background, and may also be other test systems with a multi-channel audio file analysis function, such as soundcheck/abec.
In step S3, each first frequency response curve is compared with a test frequency response curve to obtain a plurality of first difference curves, where the test frequency response curve is a frequency response curve corresponding to a frequency sweep signal for generating the first test audio.
In step S4, determining whether the plurality of first difference curves are within a preset curve interval; if all the first difference curves are within the preset curve interval, determining that the phone passes an audio test; otherwise, determining that the phone fails the audio test.
The preset curve interval is specifically a curve space formed by an upper limit curve and a lower limit curve, and when the first difference curve exceeds the upper limit curve upwards, exceeds the lower limit curve downwards or exceeds the upper limit curve or the lower limit curve simultaneously, the phone is determined not to pass the audio test.
Therefore, according to the phone multi-microphone audio testing method provided by the invention, the electroacoustic testing system controls the plurality of microphones of the phone to simultaneously pick up the same testing audio, so that the time consumption of repeatedly playing and picking up the audio when each microphone is tested independently is avoided, and each microphone receives the same first audio file, so that the interference caused by the audio difference of playing the first audio file for multiple times can be avoided; the generated single-channel files are synthesized into multi-channel files and analyzed by the electroacoustic test system in multiple processes, so that the analysis time can be saved, and the test efficiency can be improved.
Example 2:
the invention also discloses an audio test method of the multi-microphone phone, which is applied to the multi-microphone phone for audio test, and the method mainly comprises the following steps:
step S5 is to receive the first test audio to be played and to simultaneously pick up sound from a plurality of built-in microphones, thereby generating a multi-channel audio file.
Step S6, sending a multichannel audio file to an electroacoustic test system, enabling the electroacoustic test system to convert the multichannel audio file into a plurality of first frequency response curves, enabling the electroacoustic test system to compare the plurality of first frequency response curves with the test frequency response curves to obtain a plurality of first difference curves, and judging whether the plurality of first difference curves are in a preset curve interval; if all the first difference curves are within the preset curve interval, determining that the phone passes an audio test; otherwise, determining that the phone does not pass the audio test; and the test frequency response curve is a frequency response curve corresponding to a frequency sweeping signal for generating the first test audio.
The audio testing method in embodiment 2 of the present invention is applied to the same testing scenario as the audio testing method in embodiment 1, except that embodiment 1 is written with an electroacoustic testing system as an execution subject, and embodiment 2 is written with a phone as an execution subject. It can be seen that the method for generating the first test audio, the method for synthesizing the single-channel audio file into the multi-channel audio file, and the method for transmitting the multi-channel audio file from the phone to the electroacoustic test system in embodiment 2 are the same as those in embodiment 1, and are not described herein again. Meanwhile, the beneficial effects of the audio testing method in the embodiment 2 are the same as those of the embodiment 1.
Example 3:
the invention also discloses an audio test device of the multi-microphone phone, which is applied to the audio test of the multi-microphone phone and mainly comprises the following parts: a first control module 101, a first receiving module 102, a first comparing module 103 and a first judging module 104.
The first control module 101 plays a first test audio to a phone, so that multiple microphones built in the phone pick up sound at the same time, and a multi-channel audio file is generated.
The first receiving module 102 receives the multi-channel audio file sent by the phone, and converts the multi-channel audio file into a plurality of first frequency response curves.
The first comparison module 103 compares each first frequency response curve with a test frequency response curve to obtain a plurality of first difference curves, where the test frequency response curve is a frequency response curve corresponding to a frequency sweep signal for generating the first test audio.
The first determining module 104 determines whether the plurality of first difference curves are within a preset curve interval; if all the first difference curves are within the preset curve interval, determining that the phone passes an audio test; otherwise, determining that the phone fails the audio test.
In this embodiment, the playing the first test audio to the phone specifically includes:
and sending a preset frequency sweeping signal to a sound card and a power amplifier for processing, and playing through an artificial mouth to generate a first test audio.
In this embodiment, the playing the first test audio to the phone specifically includes:
and sending a preset frequency sweeping signal to a sound card for processing, and then playing through a loudspeaker of the phone to generate a first test audio.
In this embodiment, the causing of multiple microphones built in the phone to pick up sound at the same time to generate a multi-channel audio file specifically includes:
a plurality of microphones built in the phone pick up sound simultaneously and generate single-channel audio files corresponding to each microphone, and the plurality of single-channel audio files are synthesized into a multi-channel audio file.
To sum up, compared with the prior art, the audio testing method and the device of the multi-microphone phone disclosed by the embodiment of the invention have the beneficial effects that: the microphones of the phone can simultaneously pick up the same test audio, so that the time consumption of repeatedly playing and picking up the audio when each microphone is independently tested is avoided, and each microphone receives the same first audio file, so that the interference caused by the audio difference of the first audio file played for multiple times can be avoided; the generated single-channel files are synthesized into multi-channel files and analyzed by the electroacoustic test system in multiple processes, so that the analysis time can be saved, and the test efficiency can be improved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A method for audio testing of a multi-microphone phone, comprising:
playing a first test audio to a phone to enable a plurality of microphones built in the phone to pick up sound simultaneously and generate a multi-channel audio file;
receiving a multi-channel audio file sent by the telephone, and converting the multi-channel audio file into a plurality of first frequency response curves;
comparing each first frequency response curve with a test frequency response curve respectively to obtain a plurality of first difference curves, wherein the test frequency response curve is a frequency response curve corresponding to a frequency sweep signal for generating the first test audio;
judging whether the plurality of first difference curves are within a preset curve interval or not; if all the first difference curves are within the preset curve interval, determining that the phone passes an audio test; otherwise, determining that the phone fails the audio test.
2. The audio testing method of a multi-microphone phone according to claim 1, wherein the playing the first test audio to the phone specifically comprises:
and sending a preset frequency sweeping signal to a sound card and a power amplifier for processing, and playing through an artificial mouth to generate a first test audio.
3. The audio testing method of a multi-microphone phone according to claim 1, wherein the playing the first test audio to the phone specifically comprises:
and sending a preset frequency sweeping signal to a sound card for processing, and then playing through a loudspeaker of the phone to generate a first test audio.
4. The audio testing method of a multi-microphone phone according to claim 1, wherein the multiple microphones built in the phone are used for simultaneously picking up sound to generate a multi-channel audio file, specifically:
a plurality of microphones built in the phone pick up sound simultaneously and generate single-channel audio files corresponding to each microphone, and the plurality of single-channel audio files are synthesized into a multi-channel audio file.
5. The audio testing method of a multi-microphone phone according to claim 1, wherein the receiving of the multi-channel audio file sent by the phone specifically comprises:
receiving a multi-channel audio file sent by the telephone through a USB protocol;
or, receiving the multichannel audio file transmitted by the telephone by using a third-party file server tftp32 tool through multiple TCP/IP protocols.
6. A method for audio testing of a multi-microphone phone, comprising:
receiving the played first test audio and enabling a plurality of built-in microphones to pick up sound simultaneously to generate a multi-channel audio file;
sending a multi-channel audio file to an electroacoustic test system, enabling the electroacoustic test system to convert the multi-channel audio file into a plurality of first frequency response curves, enabling the electroacoustic test system to compare the plurality of first frequency response curves with the test frequency response curves to obtain a plurality of first difference curves, and judging whether the plurality of first difference curves are within a preset curve interval; if all the first difference curves are within the preset curve interval, determining that the phone passes an audio test; otherwise, determining that the phone does not pass the audio test; and the test frequency response curve is a frequency response curve corresponding to a frequency sweeping signal for generating the first test audio.
7. An audio testing apparatus for a multi-microphone phone, comprising: the device comprises a first control module, a first receiving module, a first comparison module and a first judgment module;
the first control module is used for playing a first test audio to a phone so as to enable a plurality of microphones built in the phone to pick up sound at the same time and generate a multi-channel audio file;
the first receiving module is used for receiving a multi-channel audio file sent by the telephone and converting the multi-channel audio file into a plurality of first frequency response curves;
the first comparison module is used for comparing each first frequency response curve with a test frequency response curve respectively to obtain a plurality of first difference curves, wherein the test frequency response curve is a frequency response curve corresponding to a frequency sweeping signal for generating the first test audio;
the first judging module is used for judging whether the plurality of first difference curves are within a preset curve interval or not; if all the first difference curves are within the preset curve interval, determining that the phone passes an audio test; otherwise, determining that the phone fails the audio test.
8. The audio testing apparatus of claim 7, wherein the playing the first test audio to the phone is specifically:
and sending a preset frequency sweeping signal to a sound card and a power amplifier for processing, and playing through an artificial mouth to generate a first test audio.
9. The audio testing apparatus of claim 7, wherein the playing the first test audio to the phone is specifically:
and sending a preset frequency sweeping signal to a sound card for processing, and then playing through a loudspeaker of the phone to generate a first test audio.
10. The apparatus according to claim 7, wherein the plurality of microphones built in the microphone are configured to pick up sound simultaneously to generate a multi-channel audio file, specifically:
a plurality of microphones built in the phone pick up sound simultaneously and generate single-channel audio files corresponding to each microphone, and the plurality of single-channel audio files are synthesized into a multi-channel audio file.
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